SPI 09-726-04B Piston Kit .040 73MM

( Brand: Spi ), ( Manufacturer Part Number: 09-726-04B ), ( Part Type: Piston ), ( Country Of Origin: Taiwan )

Review SPI .040 Over Bore Piston Kit Polaris 73mm fits WIDETRAK LX 500 1998–2011

Introducing the SPI 09-726-04B 040 Piston Kit, specifically designed for the Polaris Widetrack LX 500 model years 1998 to 2011 with a 73mm bore size. This high-performance piston kit is an excellent choice for those seeking to upgrade their ATV's engine or for those in need of a replacement.

The pistons in this kit are meticulously engineered to provide superior strength and durability. Each piston is made from a forged aluminum alloy, ensuring a strong and consistent structure that can withstand the rigors of off-road riding. The piston skirts are optimally designed for a snug fit within the cylinder bore, minimizing the potential for blowby and reducing power loss.

The piston tops are equipped with a state-of-the-art, high-performance ring package. This includes a compression ring, an oil control ring, and a top ring, all of which are designed to provide optimal sealing and engine performance. The rings are precision-machined to ensure a perfect fit and optimal ring gap, ensuring maximum compression and efficient combustion.

This piston kit also includes new wrist pins and piston pin bushings. The wrist pins are manufactured from high-strength, chrome-molybdenum steel, providing the strength and durability required to withstand the forces generated by the engine. The piston pin bushings are made from a high-quality, wear-resistant material, ensuring a long-lasting, reliable fit.

The piston kit includes everything necessary for a straightforward installation, including installation hardware. The kit is backed by SPI's commitment to quality and customer satisfaction, ensuring your peace of mind and confidence in your purchase.

Upgrade your Polaris Widetrack LX 500 with the SPI 09-726-04B 040 Piston Kit and experience improved engine performance, durability, and reliability.

Buying the SPI 09-726-04B 040 piston kit for a Polaris Widetrack LX 500 (1998-2011, 73mm) can be a consideration for those seeking to upgrade or replace their engine components. Here are some potential pros and cons of this purchase:

1. Improved Performance: A new piston kit can lead to enhanced engine performance, including increased horsepower and torque. This can result in a smoother, more powerful riding experience.

2. Enhanced Durability: New pistons can provide better protection against engine wear and tear, extending the life of the engine and reducing the need for frequent repairs.

3. Better Fuel Efficiency: Worn-out pistons can cause inefficiencies in the engine that lead to decreased fuel efficiency. A new piston kit can help improve fuel efficiency by reducing friction and ensuring proper combustion.

1. Cost: Replacing a piston kit can be a significant investment, especially if other engine components need to be replaced at the same time.

2. Installation Complexity: Installing a new piston kit can be a complex and time-consuming process that may require specialized tools and expertise. It may be necessary to hire a professional mechanic to ensure proper installation.

3. Risk of Damage: Improper installation or use of incorrect components can result in damage to the engine or other parts of the vehicle. It is important to ensure that the new piston kit is compatible with the specific Polaris Widetrack LX 500 model and year.

The decision to buy the SPI 09-726-04B 040 piston kit for a Polaris Widetrack LX 500 depends on various factors, including the current condition of the engine, riding habits, budget, and personal preferences. If the engine is showing signs of wear, or if the vehicle is used frequently for heavy-duty tasks, then investing in a new piston kit may be a worthwhile consideration. However, it is important to carefully weigh the pros and cons, including the cost and complexity of installation, to ensure that this is the best choice for your specific situation.

Before making a purchase, it is recommended to consult with a qualified mechanic or Polaris dealer to assess the current condition of the engine and determine if a new piston kit is necessary. Additionally, ensure that you are purchasing the correct kit for your specific Polaris Widetrack LX 500 model and year. Proper installation by a qualified mechanic is also essential to ensure optimal performance and longevity of the new components.

Details:

Piston is for .040 over bore size 73.00mm. Piston weight is compatible with original piston. Manufactured by SPI. T-Molly series pistons reduce friction, resist seizure improve durability.

Compatible with Polaris model's below: 1998 Widetrak LX 500. All SPI pistons, rings, pins cir clips are manufactured to OEM specifications. Includes piston, ring set, wrist pin cir clips as pictured. T-Molly series with Teflon-Molybdenum coating.

Made in Taiwan. 1999 Widetrak LX 500. 2000 Widetrak LX 500.

part #: 0972604b prices

• $74.95-$144.95

specifications enginesnowmobile:

• for models: Lx, 500, Widetrak
• for makes: Polaris
• for years: 1998-2011
• brand: Spi
• mpn: 09-726-04b
• part type: Piston
• country of origin: Taiwan

general enginesnowmobile:

• condition: New
• Snowmobile Parts > Engines Components > Snowmobile Engine Components

returns enginesnowmobile:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

shipping enginesnowmobile:

• type: Fixed
• cost: $0.00
• class: Standard
• service: Standard
• transit: 3-7 Days

offer enginesnowmobile:

• options: Ship-to-home
• quantity: 4
• availability: In Stock
• sold: 0
• started: June 8, 2026

payments enginesnowmobile:

• wallet: Paypal
• credit card: Visa
• other

seller enginesnowmobile:

• # reviews: 419488
• rating: 99.9%
• city: Suamico, Wisconsin

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